Firearm



G. SANDINE FIREARM Filed Feb. 7, 1954 \ww ww Sn bk NK Nov. 3, 1936.

INVENTOR HIS ATTORNEYS Patented Nov. 3, 1936 UNITED STATE TT OFFIQE.

1 Claim.

My invention relates to firearms, and has among its objects and advantages the provision of an improved gauge reduction liner for incorporation With a shotgun of a given gauge to permit the use of, smaller gauge ammunition. 'Ihe invention embodies a novel ejecting mechanism for shells of the smaller gauge constructed and arranged to be operated by the gun ejector for the larger gauge shells.

'Ihis invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specically pointed out in the appended claim.

In describing my invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:

Fig. 1 is a fragmentary view of. a 12-gauge shotgun showing my invention associated therewith;

Fig. 2. is a fragmentary sectional View of the reduction liner;

Fig. 3 is a sectional view taken along the line 3--3 of Fig. 2; and

Fig. 4 is a sectional view taken along the line 4-4 of Fis. 2.

In the embodiment selected to illustrate my invention, I make use of a lZ-gauge shotgun IIJ comprising a barrel I2 pivotally connected with the usual gun stock I4 through the medium of a pivotal connection I6. Referring to Fig. 1, the bore I8 is counter-bored at 28 to provide a shell chamber and counter-bored again at 22 for accommodating a flange associated with the standard shell.

I illustrate an ejector block 24 mounted upon a pin 26 slidably positioned within the bore 28 in the part 38 xedly associated with the barrel I2. Means for actuating the ejector block 24 comprises a shaft 32 having one end riveted to the block 24 and its opposite end extending into a recess 34 and in operative relation with anger 36 comprising a part of the pivotal connection I6. Thus, when the gun is broken through the medium of the lever 28, the nger 36 shifts the shaft 32 rearwardly for moving the ejector block 24 and the shell within the chamber 20. I have illustrated latch elements 48 and 42 as being operatively connected with the lever 38 and arranged within the recesses 44 and 46, respectively, in the part 30 for latching the barrel IIJ with the stock I4 in the full line position shown in Fig. l. Of course, the structure described so a reenforcing sleeve 54 pressed upon the liner 1Ul 48 and cemented thereto at the juncture 56. One end of the sleeve 54 may be tapered at 58 and the end of the liner upset at 6D to rmly connect the sleeve with the liner.

I mount a plurality of, spring clips 62 upon the 375:

front end of the liner 48 for supporting the forward end of the gun concentrically with respect to the barrel I2. These clips frictionally engage the wall of the barrel I2 in such a manner that the liner is held firmly against rearward move- 20 ment within the barrel. However, the clips permit the liner to be easily removed when desired.

I show the clips 62 as comprising integral parts of a ring 64 pressed upon the liner and welded at 66. The clip 62 originally comprises parts of 25 the tubular section from which the ring 64 is made and defined by large cut-outs 68 wider at their bases than at the free ends of the clips to permit the clips 62 to be liared outwardly and retain the necessary resiliency.

Means for adjusting the liner 48 longitudinally of the barrel I2 comprises a pair of lock nuts 10 and 12 mounted upon a threaded reach 14 cut in the outer wall of the sleeve 54. Referring to Fig.

1, I adjust the lock nuts in such a manner that 35 the nut 12 will engage the shoulder 16 dening the boundary between the shell chamber 20 and the bore I8. In this way, the nut 12 may be adjusted upon the thread 14 to provide precise adjustment to shell chambers of various depths in guns of 40 standard construction. In guns having a shoulder 16 of slow taper, the wedged condition of the nut 16 against the shoulder will, of course, tend to give concentric alignment of the rear end of the reduction liner with respect to the gun barrel.

In Fig. 2, I illustrate an ejector sleeve 18 slidably mounted upon the reenforcing sleeve 54 and having a flange equal in diameter with the bore 50 and abutting the end 82 of the liner 48 in its full line position. The flange 84 assumes 50 a position Within the groove 86 in the ejector block 24 and is operated thereby in the same way as a l2-gauge shell within the chamber 20. I

make the ejector sleeve 18 of a diameter substantially equal to the original diameter of a l2- gauge shell, so that the ejector sleeve operates freely within the shell chamber 20.

However, the diameter of the ejector shell 18 with respect to the diameter of the shell chamber is such that concentric alignment of the rear end of the reduction liner 48 may be attained apart from any wedging action between the lock nut 12 and the shoulder 16. I'he primary function of the lock nuts is to permit precise adjustment of the reduction liner longitudinally of gun barrel l2.

In operation, the ejector block will pull the ejector shell 18 rearwardly, as indicated by dotted lines in Fig. 1. At this time the ejector sleeve 'F8 may be grasped and pulled back until the edge 88 defining a part of the slot 9@ strikes the screw 92 `threaded into the threaded bore 9! extending through the reenforcing sleeve 5d and the liner 48. This screw is in the nature of a set screw with its inner end arranged to project slightly beyond the inner wall of the bore 50 as indicated at 96.

Thus, the inner end of the set screw has frictional engagement with the side of the small shell within the chamber 5B, so that the small shell will remain in the dotted line position indicated at 98 inFig. 2 when the ejector sleeve 'F8 is pushed inwardly. When the ejector sleeve has been pushed inwardly the shell 98 projects suiciently far beyond the end of the shell chamber to permit easy grasping of the shell for removal purposes.

Obviously, my liner need not be limited to a L10-gauge for association with a 12-gauge shotgun, but may be designed for the accommodation of various types of ammunition and for incorporation with guns of different types, including rifles as well as Shotguns.

Without further elaboration the foregoing will so fully explain my invention that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

The combination with a shotgun having a barrel of predetermined gauge and a shell ejector associated therewith, said barrel having a shell chamber and a shoulder between the shell chamber and the bore proper, of a gauge reduction liner removably arranged Within said barrel, an ejector sleeve slidably mounted on said reduction liner and having a diameter and an end flange of the size and shape of ammunition corresponding to the gauge of said barrel, to be operated by said shell ejector, said ejector sleeve being provided with a slot in its wall, a set screw passing through said reduction liner and having one end positioned within said slot and the other end extending into the bore of the reduction liner to hold the shell therein against movement with respect to the liner, said slot permitting shifting of the ejector sleeve longitudinally upon said reduction liner, clip means connected with one end of said reduction liner and arranged for frictionally engaging the bore proper of said barrel, to support the liner concentrically therein, and an adjustable element mounted upon said reduction liner and arranged to engage the shoulder between the bore proper of the gun barrel and its shell chamber, to precisely adjust the position of the liner longitudinally within the gun barrel.

GUNN ARD SANDIN E 

